Best Window Insulation Kits

The film in window insulation kits doesn’t attach directly to the glass of a window. As long as you shrink the film properly with a blow-dryer, visibility isn’t really affected, so you don’t have to give up your view for a more comfortable home. From my experience, installation takes just 15 to 20 minutes with the right tools, which you probably already own—scissors and a hair dryer.

If you want to be able to open your windows occasionally, you might want to consider weather stripping and window sealing tapes, which are easier to install and to remove.

We tested four insulation kits to determine which were more durable, scratch- and puncture-resistant, and easier to install. This was the first time I had ever used any of these kits, and I found the process simple enough that I’m considering one for my own apartment windows.